if you can't afford Assos, Giordana is your best bet. I've had my Silverline bibs for less than a year and a a couple thousand miles and they still feel like new. There are times when I have to wear them 2 days in a row (washing in between of course) and they still feel great, not as great as after getting a week to dry but they are still fairly dry after a day.
Cheap bibs are bad. Don't go for cheap cycling apparel.